Improvement of Propylene Epoxidation Caused by Silver Plasmon Excitation by UV-LED Irradiation on a Sodium-Modified Silver Catalyst Supported on Strontium Carbonate

The effect that UV-LED irradiation exerted on a sodium-modified silver catalyst supported strontium carbonate (Ag-Na/SrCO3) was examined during an epoxidation of propylene to oxide. Based our previous study, we used Ag(56)-Na(1)/SrCO3 in this study. numbers parentheses refer the weight percentage and sodium. Although system did not contain typical photocatalysts such as titanium oxide or tungsten oxide, resulted evident improvement selectivity yield Such advantageous could be discussed based bandgap and, therefore, proposed mechanism plasmon excitation silver, which accomplished using wavelength produce electrons. Since lifespan these electrons is expected short, it difficult place them into direct contact with gas phase oxygen. Once generated move SrCO3, however, improved, allow suitable oxygen form active If for hydrogen peroxide, explain activity from irradiation.